Effect of Coulomb enhancement on optical gain in (Zn, Cd)Se/ZnSe multiple quantum wells

F. Logue, P. Rees, J. Heffernan, C. Jordan, J. Donegan, J. Hegarty, F. Hiei, A. Ishibashi

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The optical-gain spectra of a 40-Å (Zn,Cd)Se/ZnSe multiple quantum well has been measured at various temperatures using a variable-stripe method. By comparison with a gain calculation including many-body effects, we have shown that gain in this structure arises from an electron-hole plasma (EHP) for temperatures higher than 140 K. Excellent agreement between experiment and theory allows us to demonstrate the signifi-cance of many-body effects such as carrier dephasing and Coulomb enhancement. The breakdown of the EHP model below 140 K indicates an increasing excitonic contribution.

Original languageEnglish (US)
Pages (from-to)16417-16420
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number23
DOIs
StatePublished - 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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